Blower or pump.



P. J. MINER. BLOWER OR PUMP.

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P. J. MINER. BLOWER 0R PUMP. APPLIOATION FILED H1126, 1909. RBNEWBD JUNE29, 1910.

Patented Dec. 20, 1910.

3 SHEETS-BHEET 2.

INVENTOR 7 TToRNEx/S WITNESSES.'

THE NaRRls Parras ca v/As F. J, MINBR.

BLOWER 0R PUMP. APPLICATION FILED PEB. ze, 1909. RBNIIWBD JUNE 29, 1910.

Patented Dec. 20, 1910.

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INVENTOR afm I 1HE Noxms PETERS 52 WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

FRANK J. MINER, OF DETROIT, MICHIGAN, ASSIGNOR TO MINER ENGINEERING COM-PANY, OF DETROIT, MICHIGAN,

BLOWER Application filed February 26, 1909, Serial No. 480,227.

To all whom it may concern:

`Be it known that I, FRANK J. MINER, a citizen of the United States ofAmerica, residing at Detroit, in the county of lVayne and State ofMichigan, have invented certain new and useful Improvements in Blowersor Pumps, of which the following is a specification, reference being hadtherein to the accompanying drawings.

In pressure blowers or pumps of the type wherein the blades moving in aclosed casing are used to propel the air or fluid therethrough, it iscustomary so far as known to me to employ either radial or propellerblades secured to a rotatable shaft, or else a series of buckets carriedby a flexible endless belt or chain passing around and driven bysuitable rotating members. In blowers of this type constructed in suchmanner, it is difficult to prevent leakage around the blades, and,furthermore, in the belt or chain type, the stretching of the chain orbelt, due to centrifugal force, is a very obnoxious feature.

This invention relates to a blower or pump whereby a series of conveyerblades moving at constant speed are adapted to impart velocity to theair or fluid propelled greater than the speed of the blades and wherebyleakage around the blades is to a large eX- tent obviated and thedestructive effects of centrifugal force are prevented.

The general structure of the device shown but not claimed in thisapplication corresponds to that shown and claimed in my priorapplication for blowers or pumps, iiled May E30, 1908, Serial No.430,433.

The invention consists in the matters hereinafter set forth, and moreparticularly pointed out in the appended claims.

In the drawings, Figure 1 is a view in central transverse section of ablower or pump embodying features of the invention. Fig. 2 is a view,partially in section and partially iii side elevation, on line m-rv ofFig. 1. Fig. 3 is a view in longitudinal section through the casing'showing propelling blades in end elevation.

Referring to the drawings, 1 indicates a drum or shell closed by sideplates 2 detachably secured in place by suitable means and Specificationof Letters Patent.

A CORPORATION OF MICHIGAN.

OR PUMP.

Patented Dec. 20, 1910.

Renewed June 29, 1910. Serial No. 569,579.

provided with elongated central openings. i Bonnets 3 secured over theseopenings, have l alined bearings A in which a central drive shaft 5 isjouriialed, a pulley wheel G or like means for applying power beingsecured on its outer end. A gear wheel 7 is secured on l the shaft ineach bonnet. A series of toothed l racks S adapted to mesh with thegears are pivoted together at their ends to form an endless chain iiieach bonnet by pivot bolts 9 extending transversely through the casingchannel. Friction rolls 10 journaled on the pivot pins within thebonnets bear outwardly against the face of a flange 11 which forms acani path or track around the inner face of each bonnet, of such contouras to hold the racks in mesh with the drive gear 7. As a convenientdetail of construction the' l eo `opeiiiiigs in the side plates 2 areslightly l smaller' than and concentric with the cam path whereby aretaining ledge is formed which prevents eiidwise movement of the rolls10.

Each pair of links in the chain is secured rigidly to the base of ablade 13 extending transversely across the shell. The blade ispreferably substantially triangular in crosssection and is adapted tocompletely fill the space between the rack and the inner periphery ofthe drum or shell. A plate 14 movably secured in a slot in the apex ofeach blade is yieldingly projected against the i inner periphery of theshell by suitably disposed springs 15. As a preferable mechanicalconstruction a rib 16 of fiber or like material is inset in the outeredge of each blade as a convenient means for eliminating friction andsecuring a tight joint with the shell and casing after the manner of apiston packing ring.

, The drum 1 has an inlet opening 17 connected by oppositely disposedchannels 18 with intake ports 19 which are so disposed as to be swept byeach blade at the moment of its greatest acceleration due to the angularmovement imparted to it by the rounded l, ends Q0 of the cam pathbetween parallel straight limbs 21 thereof. A discharge in the shellwith discharge ports 24 each so disposed as to be swept by each blade atthe moment oit its commencing' its t'orward angular movement. Y

Vinasmuch as the links when they pass around the corners o'l' the campath open so as to leave a small space indicated at 25. washers 2G areplaced upon the pivot pin tl in suchv position as to sea l. theseopenings.

v'lhe blades are connected by or have hinged joints indicated at 2T and2S ot such a nature that they are tight and do not allow the air ortluid to escape by them.

Py this arrangement of parts each blade as it approaches an inlet porthas an accelerated motion in reference to the blade ahead ot it wherebythe air or tluid t 'apped between it and the preceding` blade .iscompressed and held under pressure while each pair ot' bl: des aretraversing' either' ot the pa 'allel limbs 21 ot' the cam path. As eachblade commences its accelerated motion around the end ot' the fam pathit r; pidly uncovers an exhaust port and allows the t'apped orcompressed air or tluid to escape through the outlet thereby imparting avelocity to it higher than the traveling` speed ot the blades.

One ot the chiet advantages of the eon- .struction the rigid continementor" the pi'opelling links by the :am path so that under high speed,centrifugal torce does not tend to throw the blades outward toward theshell and they therefore lan be made to closely tit. thus greatlyincreasing the etiiciency ot the blower. Furthermore, the increasedleverage due to the sweeping' ot' the torv 'ard pivot in each linkaround the short turn ot the path increases the compressinre` power atthe moment when it is most needed without materially altectmg' theI loadon the drive gear.

The taces ot the wheels and links may be ma le wide enough totransmitany desired powe' and the machine is simple in its constructionand very etiiective.

Obviously, changes in the details ot construction may be made withoutdeparting' from the spirit olI the invention and lY do `not care tolimit niyselt to any particular Jt'orm or arrangement ot parts.

ll'hat l claim as my invention is l. rllhe coinbini'ition with a 'asinghavingr inlet and outlet ports, ot' a series of revoluble bladesarranged within said casing' and maintained in substantially pa 'allelrelation transverse to the casing' to torni a plurality of pocketssuccessively connnunicating with said inlet and outlet ports` means `torrotat inge' said blades ditterentially to expand and contact saidpockets when respectively in coinmiuiication with said inlet and outletports, and means in the casing engaging the yl l i l -within said casingto torni a se blades adapted to define the motion thereof when operatedby the rotating;v means.

rthe combination with a casing having inlet and outlet ports otlrevoluble blades articulated tog/'ether and maintained in planesparallel to the axis ot revolution ries ot iiiocliets successivelycominunicating' with said inlet and outlet ports, rotatable drivingmeans adapted to revolve the blades in the lasiiile` and means in thecasing engaging the blades and coactiiig with the driving'lnieans tomove the blades dilterentially whereby the said pockets are expanded andcontracted when respectively in communication iyzith lsaid inlet andoutlet ports.

il. The combination with a 'asingI having' inlet and outlet ports ofi'evoluble blades articulated together and maintained in planes parallelto the axis ot revolution within said casing to 'it'orui a series olpockets successively communicatingr with said inlet and outlet ports andadapted to travel in a 'am path in the asing` whereby the said. pocketsare succes ely expanded and contracted when respectively incomminiication with said inlet and outlet ports, and a rotatable memberengaging theblades adapted to move them around the j-am path.

-l. The combination with a fusingY having inlet and outlet ports otrevoluble blades having rigid bases articulated in an endless chainwithin the c: sing whereby the blades torni a series oli' pocketssuccessively communi -ating with said inlet and outlet ports and adaptedto trafvel in a cam path `in the 'asiirg' whereby said pockets aresuccessively expanded and contracted when respectivly in communi 'ationwith said inlet and outlet ports and a rotatable member adapted tosuccessively engage and move the blade bases along the path. the bladesbeingI maintained in planes parallel to thl ax's ot revolution.

5. 'llhe combination with a casing having inlet and outlet ports, ofrevoluble blades ha ving' rigid bases articulated in an endless chainwithin the casing' whereby the blades torni a series ot' pocketssuccessively conimuiiicating with said inlet and outlet ports` a tianegedeliningg the motion ot' the bases and a rotatable member adapted toengage and drive the bases along` the llange, the tlange and n'ieinbercoactinfe to successively expand and contract the pockets as they arerespectively in communi 'ation with said inlet and outlet poi'ts. theblades being' maintained in planes parallel to the axis ot revolution.

(3. rl"he combination with a casingI havingr inlet and outlet ports. oitrevoluble blades.y bases on the blades articulated in an endless chainwithin the casing' whereby the blades torni a series ot pocketssuccessively com ,municating with said inlet and outlet ports` CIK eachbase having raclt teeth on its inner side, g in Contact with the shellthroughout the an endless flange in the casing confining the blades tomove along a predetermined path, and a rotatable gear engaging the baseracks successively and forcing them along the flange, the gear andflange coacting to successively expand and contract the pockets as saidinlet and outlet ports.

T. rl`he combination with a casing having inlet and outlet ports and aflange on its wall forming an endless cam path of revoluble bladesarticulated in an endless chain at their bases which form toothed linkstherein, and a rotatable gear in mesh with the links, adapted to holdthe blade bases against the cam flange and force them along it.

S. The combination with a casing having inlet and outlet ports, sidewalls with corresponding flanges on their proximate faces each formingan endless cam path, a gear rotatably secured in the casino', andrevoluble blades in the casing articulated in an endless chain engagingthe gear and limited in its direction of motion by the flanges, thelatter being adapted to alternately accelerate and retard the motion ofeach blade, and the casing having an exhaust port at the place ofacceleration of the blades and an inlet port at the place ofretardation.

9. The combination with a casing having inlet and outlet ports andconsisting of an outer shell and parallel side plates closing the shellends, a shaft journaled in the casing, and inwardly extendingcorresponding cam flanges on the side plates around the shaft, a seriesof blades articulated in an endless chain encircling the shaft withinthe flanges which are adapted to engage the blades near the inner ends,and a driving member on the shaft adapted to engage the blades and forcethem against and along the flanges with their outer ends sweeping theinner face of the shell, the cam flanges being adapted to accelerate themotion of each blade as it approaches an outlet port and recedes from aninlet port.

10. The combination with a casing having inlet and outlet ports andconsisting of an outer shell, parallel side plates closing the shellends, a shaft journaled in the casing and a pair of inwardly extending,corresponding flanges on the side plates around the shaft. of a seriesof blades articulated in an endless chain around the shaft within theflanges against which the blade bases are adapted to bear outwardly anda driving member on the shaft adapted to engage the blades and to forcethem outwardly and along the cam flanges, the flanges, driving memberand blade coacting to hold the blades substantially perpendicular to andl the motion of each blade transit of the cam flange, and to accelerateas it approaches an outlet port and iecedes from an inlet port.

11. The combination with a casing havg ing inlet and outlet ports andconsisting of they are respectively in communication with i l l l anouter shell, parallel side plates closing the shell ends, a shaftjournaled in the casing and a pair of inwardly extending, correspondingcam flanges on the side plates around the shaft, of a series of bladessubstantially triangular in section pivotally connected at their basecorners, and adapted at their bases to bear againstthe inner faces ofthe cani flanges with the apices sweeping the inner face of the shelland a drive member on the shaft forcing the bases along the flange, thebases, flanges and driving member coacting to accelerate the motion oeach blade as it approaches an outlet port and recedes from an inletport.

12. The combination with a casing having inlet and outlet ports andconsisting of an outer shell and parallel side plates closing the shellends, a shaft journaled in the casing and a pair of inwardly extending,corresponding cam flanges on each side plate around the shaft, of aseries of blades triangular in section, pivot pins each articulating theadjacent base ends of a pair of blades and engaging the inner faces ofthe cam flanges, and driving means on the shaft engaging the blade basesand forcing the pivot pins around the flanges, the driving means,flanges and pins coacting to accelerate the motion of each blade as itapproaches an outlet port and recedes from an inlet port.

13. rl`he combination with a casing having inlet and outlet ports andconsisting of an outer shell, parallel side plates closing the shellends, a shaft journaled 'in the oasing and a pair of inwardly extending,corresponding eani flanges on the side plates around the shaft, of aseries of blades substantially triangular in section and pivotallyconnected at their base corners, and adapted at their bases to bearagainst the inner faces of the cam flanges with the apices sweeping theinner face of the shell, a drive member on the shaft forcing the basesalong the flange, the bases, flanges and driving member coacting toaccelerate the motion of each blade as it approaches an outlet port andrecedes from an inlet port, and a movable member in the outer end ofeach blade yieldingly coacting with the shell.

14. A casing with inlet and outlet ports, and having an outer shell,side plates closing the ends of the shell each provided with surroundedby an ina central opening wardly extending cam flange, a series ofblades having extended bases articulated atthe flanges with the outerblade ends sweepthe ends 1n an endless chain, Cain rolls ating theinnei1 face of the shell. 10 the base ends eaeli bearing against theinner In testimony whereof I aliX iny sigi'iatule laee of the proximateflange, rack teeth on in presence of two Witnesses.

,i the inner margins of the bases in the planes FRANK J. MIN ER.

[l of the eain lianges, a shaft, and driving Titnessesz gears on theshaft engaging the adjacent f C. R. STICKNEY,

bases, adapted to force the blades around A. M. SHANNON.

